CVE-2026-86469

5.3 mediumEPSS 0.1%

Medium (5.3). EPSS 0.1% chance of exploitation in the next 30 days.

A flaw was found in GLib2. When g_file_replace() is used with G_FILE_CREATE_REPLACE_DESTINATION and creating the .goutputstream-XXXXXX temporary file fails, the library unlinks the destination and recreates it without exclusive creation or symlink protection. A local attacker who can write to the destination directory can win that race and redirect the write to another file.

Severity

CVSS 3.1

5.3 medium

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:L

EPSS: 0.1% chance of exploitation in the next 30 days; higher than 3% of CVEs (scores of 2026-10-31)
CWE: CWE-59
Published: 2026-09-07
Modified: 2026-09-08
Record from: the NVD, synced 2026-10-19

References

https://access.redhat.com/security/cve/CVE-2026-86469
https://bugzilla.redhat.com/show_bug.cgi?id=2473839
https://gitlab.gnome.org/GNOME/glib/-/blob/main/gio/glocalfileoutputstream.c
https://gitlab.gnome.org/GNOME/glib/-/work_items/4044
https://gitlab.gnome.org/GNOME/glib/-/work_items/4044

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